Combined lock and latch



M del) L. VAN ALSTYNB.

COMBINED LOCK AND LATCH.

No. 327,624. Patented 0013.6 1885.

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UniTnn STATES PATENT Ormea.,

LAVRFNCE VAN ALSTYNE, OF SHARON, CONNECTICUT.

COMBINED LOCK AND LATCH.

SPECIFICATION forming part of Letters Patent No. 327,624l date'd October6, 1885.

Application filed February 6, 1885. Serial No. 155,127. (Model.)

To @ZZ whom it 71mg/ concern: y

Beit known that I, LAWRENCE VAN AL- srYNE, of Sharon, in the county ofLitcheld and State of Connecticut, have invented a new and usefulImprovement in Combined Locks and Latches; and I do hereby declare thatthe following is a full, clear, and exact description of the same.

My invention is an improvement in a combined lock and latch designed foruse on doors, gates, and in like situations.

The object of niy invention is to simplify the construction and cheapenthe manufacture of the lock by reducing the number of parts used,whilestill preserving its durability and effectiveness in working.

My object is, further, to make the lock in a compact and convenientform, so that its application to the door or gate may be accomplishedwith little expenditure of time or labor, and with little mortising orcutting away of the door.

Another object of my invention is to provide a lock having a lockingdevice or devices for both the inner and outer sides of the door, which,when operated upon either side to lock the bolt in place, cannot bereached from the opposite side, as the key-hole upon that is thenclosed, and all communication through it is shut oil.

Subordinate to these, my main objects, are numerous incidentaladvantages arising from my peculiarconstruction and arrangement,allofwhich will be described hereinafter.

My invention consists, first, in novel and simple devices by which I amenabled to make one bolt serve the double purpose of a latch and alocking-bolt.

Secondly, my invention consists ina spring latch-bolt connected to theknob-spindle, to be operated thereby in the usual manner, and havingupon either side a device adapted to be operated by the key from eitherside to press against or engage with suitable shoul ders or a pin on thebolt to lock the same in place, said devices being so constructed andarranged with relation to the key-hole that when the key is operatedupon either side,and the bolt locked in place, no communication can behad through thekey-hole from the opposite side, thus rendering theunlocking of the door possible only from the side upon which it islocked, and preventing the possibility of the key being pushed from thelock.

Further, my invention consists in the various details of constructionand arrangement by which I am enabled to carry out successfully myobjects.

In the accompanying drawings, Figure l represents a central verticalsection taken 6o longitudinally through the casing and a portion of thedoor, some of the parts being shown in side elevation. Fig. 2 is asection through the lock-casing, taken longitudinally and horizontally,some of the parts being shown in plan.` Fig. 3 is a perspective View ofthe lockingpiece detached. Fig. 4 shows a transverse section through thebolt,locking piece, and casing on linea: x of Fig. 2, the bolt beingshown as locked. Fig. 5 shows in per-'70 spective a portion of the keyadapted to this in the casing is placed a coiled spring, b, de- 8osigned to act as in latch-bolts ordinarily used. The knob-spindle isshown at C, extending through the door and casing of the lock, andhaving a cani or hub at its center, as at c.

A link, d, forms the connection between the cam or hub and the bolt, itsforward end being held by a pin, 3, passing through ears 4 4 on thebolt, and through a slot, 5, in the link, the slot being of sufficientlength to allow the bolt to move inward against the pressure of thespring when the door is closed. As the pin 3 passes through the forwardpart of the slot in the connecting-link, the bolt may be drawn inward byturning the knob and operating the cam or hub, this action compressing 95 the spring b, which, when the knob is released, reacts and forces thebolt outward.

The devices for locking the bolt in place are now to be described.

'Ihe bolt is cut away, as shown at e, on its roo This 75 sides andbottom to make room for this mechanism, and the upper side is notched,as at d' d', to form shoulders, for the purpose hereinafter described.Within the space formedby the bolt being cut away is placed thelockingpiece c', which, as shown, is formed from a piece of metal alittle more than semicircular in cross-section, extending aroundunderneath the remaining portion of the bolt at 6, and reaching upeither side thereof a little distance above the bottoms of the notches dd', formed in the bolt.

Pins 7 7, projecting from the casing at either end of the locking-piece,serve to keep it in x proper position and prevent any longitudinalmovement of the same.

The key-hole in the casing is shown at f, being an elongated openingwith a central semicircular portion.

Upon either side of the bolt the lockingpiece is cut away centrally fromits upperv edge down to a point even with the lower edge ofthe keyhole,the portions h h at either end left uncut forming tangs or tongues inproper position to register with the notches in the upper side of thebolt, and of proper size to fit snuglyinto the said notches when thepiece is rotated.

Between the spaces 8 8 of the locking-piece is left intact a portion, 9,which extends from the lower edge of the key-hole upon one side to thelower edge of the one upon the opposite side. The lower edges of thespaces 8 8 are out, preferably, on a slight curve, and at l() in thebroader tangs h notches are cut, which, as shown, form continuations ofthe spaces 8, said notches being adapted in size and shape to receive asuitable projection on the key. Notches are also formed in the upperedges of these tangs, adapted to engage with a pin, ll, in the cut-awaypart d of the bolt.

The pins 7 7, above referred to, projecting from the casing, serve alsoto limit the longitudinal movement of the bolt, the cut-away portion ofthe bolt to the front and rear of these pins being sufciently large,however, to allow the spring to keep the bolt-head entirely exposed, orto allow it to be drawn completely within the casing when the knob isturned.

The key adapted to this form of lock is shown at D, Fig. 5. Supposingthe door closed and the bolt in position, to lock it in place the key isinserted through the hole, with the projection 12 engaging with thenotch in the tang h. The key is then turned so that the projection on itwill move downward. This action rotates or moves circumferentially thelocking-piece, bringing the tangs upon the opposite side into engagementwith the notches d dof the bolt `and the notch in said tang intoengagement with the pin ll on the bolt. As soon as this movementcommences the solid portion 9 of the locking-piece begins its upwardmovement to close the key-hole upon the opposite side, and when thetangs are in positionV in the notches of the bolt the keyhole will thenbe entirely closed, thus shutting oft all communication to the lockingmechanism from that side, and rendering the insertion of a key or otherinstrument impossible.

To furnish additional security against the possible displacement of thelocking-piece, and to prevent its being picked, a spring-plate is placedin the casing at 13, having upon its end a stud adapted to enterindentations in the solid portion of the locking-piece, whereby it isheld in a locked or unlocked position, but not, however, to such anextent as will resist the pressure from the key.

vIhe manner of combining in one bolt the operation of two, as usedheretofore, enables me to make the lock in an elongated'and, preferably,cylindrical form of small diameter, so that it may be accurately fittedin place by boring a hole in the edge of the door.

The length of the lock is immaterial to its perfect working, and theknob may therefore be set at any desired distance from the door-edge toavoid injuring or Skinning the hand.

The lock may be tted with equal facility to either left or right handdoors and without any alteration in construction, it being onlynecessary to invert the lock and apply it in this position.

Having described my invention, what I claim is- 1. In a lock, a boltadapted to have longitudinal movement, a locking-piece for said boltreaching up upon either side thereof, and having notches for thereception of the key from either side of the door, whereby thelocking-piece may be rotated or moved circumferentially to bring it intoengagement with the bolt, all substantially as described, and for thepurpose set forth.

2. In a lock, a bolt adapted to have longitudinal movement, alocking-piece for the same adapted to be operated from either side ofthe door and moved so asto close the key* hole upon the other side, andto engage with the bolt to lock it in place, substantially as described.

3. In combination, the notched bolt a, a locking-piece consisting of apiece of metal nearly semicircular in cross-section, means for holdingthe locking-piece against movement longitudinally, tangs on said pieceregistering with the notches d d in the bolt, and notches in the piecefor the reception of the key, all substantially as described.

4:. In a lock, and in combination, a bolt having notches d d, thelocking-piece partially surrounding the same, and having pairs of tangsl1J h, notches 10 10 for the key, and an intact portion, 9, whereby whenthe lockingpiece is operated upon one side ofthe door to lock the boltin place the said intact portion will move across the keyhole upon theoppo- IOO IIO

site side and close the same, all substantially In testimony whereofIhave signed my name as described. to this specification in the presenceof two sub- Io 5. In combination with a boit for a look, a seribingWitnesses. looking-piece nearly semioireular in cross- (T T T T T T 5section and adapted to be moved oireumfer- LA REB CE Ab ALSTYBD'entiaiiy, a series of indentations in the piece, Vitnesses: and aspring-catch, 13, substantially as de- ALONZO A. Buns,

scribed. GEORGE M. WALTON.

